To start off, I\'m using Asp.Net MVC 4, and I\'ve modified my solution to contain the CodeTemplates folder by following this tutorial. (I think my issue might be MVC related
As far as my understanding of your problem goes, you cannot manage two controllers within one .ps1 file, which corresponds to your "AddController" directory. You have to use the Package Manager and issue a command like
Scaffold CustomScaffolder <choose-name>
This will generate another subfolder below CodeTemplates with the name . From there, you open and edit t4 files like you did with your existing one.
More info here